Re: game paddles
- From: Daniel O'Shea <user@xxxxxxxxxxx>
- Date: Mon, 02 Apr 2007 00:20:44 +1000
I found this:
"POTX, POTY (Pins 24, 23)
These pins are inputs to the A/D converters used to digitize the
position of potentiometers. The conversion process is based on the time
constant of a capacitor tied from the POT pin to ground, charged by a
potentiometer tied from the POT pin to +5 volts. The component values
are determined by:
R*C = 4.7E-4
Where R is the maximum resistance of the pot and C is the capacitor. The
larger the capacitor, the smaller the POT value jitter. The recommended
values for R and C are 470 kOhm and 1000 pF. Note that a separate pot
and cap are required for each POT pin."
And I wanted to know, would this formula and the recommended component
values still hold true if a different voltage, say 3.3V, was supplied
rather than 5V? or does voltage just not come into the equation, so to
speak?
I have also noticed that the paddle potentiometers are wired as variable
resistors, rather than as voltage dividers - would wiring the
unconnected potentiometer terminal to ground work? What is the actual
difference in the wiper (output) signal between a variable resistor and
a voltage divider?
.
- References:
- Re: game paddles
- From: Vanessa Ezekowitz
- Re: game paddles
- Prev by Date: Re: Commodore LCD keyboard?
- Next by Date: Re: Command & Conquer 3 Tiberium Wars released for the C64
- Previous by thread: Re: game paddles
- Next by thread: The Laughing Millionare
- Index(es):
Relevant Pages
|
